Derrick with hauling engine installation for shaft plants with high conveying and rope speeds



Dec. 12, 1933. v P. MOMMERTZ ET AL 1,939,220

DERRICK WITH HAULING ENGINE INSTALLATION FOR SHAFT PLANTS WITH HIGH CONVEYING AND ROPE SPEEDS Filed Dec. 23, 1930 2 Sheets-Sheet l Dec. 12, 1933. MOMMERTZ ET AL 1,939,220

DERRICK WITH HAULING ENGINE INSTALLATION FOR SHAFT PLANTS WITH HIGH CONVEYING AND ROPE SPEEDS Filed Dec. 23, 1930 2 Sheets-Sheet 2 F [Ma Patented Dec. 12, 1933 PATIENTIOFFICE DERRICK WITH HAULING ENGINE INSTAL- .LATION FOR SHAFT PLANTS. WITH HIGH I CONVEYING AND ROPE SPEEDS Peter Mommertz, Anholt, and Franz Lenze, Mulheim-Ruhr-Styrum, Germany Application December 23, 1930, Serial No. 504,301, and in Germany January 17, 1929 3 Claims.

It is already known in shaft plants, to arrange the hauling engines above the shaft at that point of the derrick, which in-the'known arrangement of the hauling engines in separate independent 5 buildings was hitherto occupied by the rope pulleys of the derrick.

This known arrangement, which produces certain advantages, is however open to considerable disadvantages. Firstly in view of the weight of the engines and the working stresses caused by these engines, the entire derrick must be made extremelystrong and moreover a special engine shed must be provided thereon ata great height, so that such a derrick is very expensive, as compared with the former, lighter derrick.

A. further disadvantage consists in that the hauling engines are suspended in this position directly above the mouth of the shaft, so that they and their operators are directly endangered in .26 the event of an explosionor a mine fire, that is perhaps are most neers, who may become necessary in case of emergency. t i

All these disadvantagesv become doublyv apparent, if it is desired to employ still'higher rope speeds, due partly to the necessity of increasing the profitableness and the conveying figures. of

existing plants and partly to the necessity .of hoisting from greater depths.

i The heavier engine weights necessitated there by and the quicker running speeds with the vibration phenomena positively resulting therefrom, would in themselves prohibit the erection of the hauling engines in the crownof the derrick.

Moreover, the hitherto known kinds of the arrangement of the hauling engine, inwhichcthis engine is arranged outside the derrickin such a manner that the hoisting ropes must be guided obliquely, or even partly horizontally and partly obliquely, are not satisfactory in this instance. In such arrangements. vibration phenomena occur already at comparatively slow rope speeds, which phenomena limit increasing of the hoisting speed, cause rope slipping and increased rope wear and form sources of danger. Moreover, the

obliquely directed pulling forces acting upon the crown of the derrick render necessary particularly strong bracing of the'frame, and consequently an increase in the cost of the whole plant, without however doing away with the dangerous vibration phenomena which limit the permissible rope speed, which phenomena are caused by the oblique guiding of the hoisting rope.

This invention relates to a new construction of derrick with new arrangement of the hauling engines and of the rope, wherein the advantages of the above mentioned known installations are retained, whilst their disadvantages are avoided,

and moreover improvements are attained, especially' for example the possibility of increasing the hauling efficiency of the entire plant, as compared with that of the known plant, the use of higher construction for the derrick in spite of its being stressed to a greater extent owing to the increased hauling speed, and also a considerable improvement of the safe working in case of danger.

The invention consists inthat the hauling engines are arranged in the lower part of the derrick preferably under the bank near the mouth of the shaft and at the same time in such a manner that a substantially vertical course of. the hoisting rope and thereby a movement of the hoisting rope free fromwhipping are obtained.

The invention is preferably carried out in such a manner, that the driving pulley for the hoisting rope of each pair of cages or grabs is so arranged that the two hoisting rope sides he between the drivingand rope-pulleys symmetrically to the vertical line extending through the centre of the driving pulley.

In-thisarrangement even an accurately vertical guiding of the hoisting rope can be obtained, if the pairs of rope pulleys of each pair of cages or grabs are arranged at such an angle to one another, that they guide the hoisting rope side, leading to the driving pulley, vertically to the two running on, andrunning off points onthe driving pulley.

In any case it is intended according to the invention to avoid all greater oblique or horizontal guiding of the hoisting rope, such as has already been proposed in slow. running passenger lifts (American Patent No. 1,043,527,) pand moreover it has to be attained that at least the resultant formed by thetwo pulling directions of the rope between hauling drums and rope pulleys, or even the hoisting ropes themselves, extend absolutely vertically, that is possess the most favorable practical position.

The following advantages are obtained by the invention:

1. The construction of a separate engine house, which otherwise would have to be erected on the bank or above the derrick, is saved.

2. The entire derrick can be made lighter than if it had to carry on its uppermost platform the heavy hauling engines and an engine house.

3. A vertical guiding of the hoisting rope is obtained, so that whipping of the rope is avoided 'or at least considerably reduced.

4. By doing away with'the' whipping of the rope, the rope slipping is reduced;

5. In spite of the position of the hoisting engines close to the shaft, they are nevertheless.

the invention may under certain circumstances make it possible, that theexisting derrick is used, if it is desired to increase the hoisting efliciency in a unit of time for instance by increasing the rope speed beyond the maximum speed hitherto permissible. I

The novel construction of the derrick is equally suitable for hoisting both grabs and cages.

Two embodiments of the invention are illustrated by way of example in the accompanying drawings in which: I

Fig. 1 shows diagrammatically a derrick according to the invention in elevation.

Fig. 2 is a horizontal section through the derrick above the upper rope pulleys.

Fig. 3is a horizontal section through the derrick above the bank. h

Fig. 4 is a horizontal section through the derrick below the bank.

Figs. 5 to 8 show similar views of a modified form of construction.

In all the figures the same references are employed for like parts. i i

a and b are two hauling engines in the lower part of the derrick, for example with electric drive.

c, d e and f designate the sides of the hoisting ropes leading upwards from the hauling engines.

g, h, i and k are the crown block pulleys for guiding the hoisting ropes.

l is the bank, m the driving pulley of the hauling engine a, n the driving pulley of the hauling engine b.

o designates the shaft which has two cages 10 for conveying trucks or men indicated in dotted lines and also two conveying tubs 11 conveying skips also indicated in dotted lines.

The form of construction of a derrick according to the invention illustrated in'Figs. 1 to 4 shows such an arrangement of the hauling engines a, b in the derrick, that the hoisting ropes c, d, e and f extend almost vertically between the hauling engines and the rope pulleys g, h, i and k. In this instance this is obtained in that the axis of the hauling engine a is arranged in the manner shown in Figs. 1 and 4 vertically below the points, onrwhich the hoisting ropes cand d come into contact with the rope pulleys g and h respectively. The axis of the hauling engine b is accordingly arranged vertically below the points, on which the hoisting ropes e and f contact with the rope pulleys i and k respectively. Consequently the hoisting rope sides c and d lie thereby symmetrically to the vertical line extending'through the centre of the driving pulley m of'the hauling engine a, and the hoisting rope sides e and 1 lie symmetrically to the vertical line extending through the centre of the driving pulley n of the hauling engine b.

The modified'form of construction illustrated in Figs. 5 to 8 shows an absolutely vertical guiding of the hoisting rope sides 0, d; e, 1 between the driving pulleys m and n on theone hand and the rope pulleys g, h and i, k respectively on the other hand. This vertical rope guiding is attained in that the hauling engines a and b with their driving pulleys m and n are arranged, as shown in Fig. 8, below the bank Z, the rope pulleys g, h; i, It being arranged in the manner shown in Fig. 6. r

The sides 0, d; e, f of the hoisting ropes pass through corresponding apertures in the bank and in the platforms of the derrick situated above same, and they are protected against damage where necessary by pipes or other casing.

We claim:

1. A derrick with hauling engine installation for shaft plants with high hauling and rope speeds comprising a derrick frame, hauling engines having driving pulleys disposed at the lower end of the frame and within the frame, crown block pulleys at the upper end of the frame, hoisting ropes extending upwardly from the hauling engines and over the crown block pulleys and downwardly through a center shaft, the axes of the hauling engines being in vertical alinement with the points of contacts of the hoisting ropes with the crown pulleys and all of said mechanism being located within the derrick frame whereby the ropes run in substantially vertical directions and are consequently free from whipping.

2. A derrick constructed as in claim 1, comprising in combination with pairs of cages, said hoisting ropes attached to said cages and passing over the driving pulleys said crown block pulleys arranged in relation to said driving pulleys so that the sides of said ropes between said driving pulleys and said crown block rope pulleys lie symmetrically to the vertical lines extending through the centers of said driving pulleys.

3. A-derrick constructed as in claim 1 comprising in combination with cages and said hoisting ropes attached to said cages and passing over crown block pulleys in the head of said derrick, the crown block pulleys for said ropes arranged at an angle to each other, said driving pulleys for said ropes arranged so that the sides of said ropes extending from said crown block pulleys run vertically to the two running-on points and to the two running-off points on said driving pulleys.

' PETER MOMMERTZ.

FRANZ LENZE. 

